C312312111111331312111133133313331322331333133313121111331322123311   >>    C31231211111133131211113313331333132233133313331312111133132212331   <<    C312312111111331312111133133313331322331333133313121111331322123313   >>      C312312111111331312111133133313331322331333133313121111331322123312   >>